Geoege e



(No Model.)

G. R. THOMSON. DISK HARROW.

No. 859,909. Patented Mar. 22, 1887.

' N. PETERS. Pboko-Liihcgnph frame, B, on which are placed sleeves Qwhich 'UNTTED STATES PATENT @FMQE.

DISK-HARROW.

SPECIFICATION forming part of Letters Patent No. 359,909, dated March 22, 1887.

Application iilcd September 29, 1886. Serial No. fillffil (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE E. 'luonson', a citizen of the United States,residing at Gouverneur, in the county of St. Lawrence and State of New York, have invented certain new and useful Improvements in Disk-Harrows; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to disk-harrows, and has for its object to provide simple and efficient means for adjusting the obliquity of a series of gangs, the construction permitting the angle at which the gangs are to be worked to be readily changed by backing or starting the horses; and to such ends the invention consists in the construction and combination of parts hereinafter particularly described and claimed, reference being had to the accompanying drawings, forming a. part hereof, and in which- Figure 1 is a plan of the burrow with my invention applied thereto; Fig. 2, a side view of a portion of the tongue with the adjusting means applied. Figs. 3 and 4 are detailviews of the adjusting means.

In the drawings, the letter A designates a tongue having secured to its rear end a hangerhave play enough to permit the two gangs of disks, D and l), to be moved from a right angle to an oblique angle with the tongue. These sleeves carry journal-boxes E, which support the inner ends of the axles carrying the disks. The disks are spaced by spools F.

To the rear of the hanger-frame are pivoted bars G, connected by spring H, and provided with fingers I, adapted to be thrown against the faces of the disks when the gangs are moved to an oblique angle. These bars are connected toward their outer ends to the axles, preferably to boxes J on the axles. The construction and combination of the several elements so farreferred to form the subject of my application for improvement in disk-barrows filed June 17, 1886, Serial No. 205,469, and therefore are not more fully and in detail described herein.

For the purposes of illustrating the invention hereinclaimed, it is only necessary to indicate that the two gangs are adjustable with relation to the angle at which they stand to the tongue.

To enable the gangs to be easily and quickly adjusted, I connect one end of the rods K to the gangs in any suitable manner-forinstance, by uniting the ends of the rods to the boxes J, and connect the other end to a sliding dog, L, moving on the tongue.

The dog may be of any suitable construction, but in the drawings is illustrated as composed of two side plates, M, fitting on opposite sides of the tongue and connected together by cross pins or bolts N, arranged preferably so that one set will be nearer to the tongue than the other, thereby permitting the dog to tilt, so that when lifted up one of the lower pins will engage one of the notches, a, formed in a plate or rack, O, secured to the under side of the tongue, and thus hold the dogto its adjustment on the tongue. The dog is illustrated as held in engagement with the notched or ratchet bar or rack by a spring, 1?, secured at one end to the tongue and at the other bearing against the dog, so as to lift it. When it is desired to release the dog, a foot-lever, Q, secured thereto and within easy reach of the driver, is depressed,when the dog is free to be adjusted,and as soon as the pressure is relieved from the lever the spring throws the dog into engagement with the bar or rack and looks it there, as the projections form a stop to the movement of the pawl and rods.

It is apparent that when the rods K are drawn forward the gang of disks are drawn from a position at right angles to a position at an oblique angle to the tongue. This adjustment from one position to the other is readily effected,when the dog is free,oy backing or starting the horses. I prefer to secure the ratchet bar or rack to the under side of the tongue, but do not restrict myself to such location, as it might be located elsewhere. So, too, it is apparent that if the lower side of one end of the pawl be weighted or made heavier than the end which engages with the rack or bar, so as to keep the latter end up against the rack, the spring can be dispensed with.

As hereinbefore stated, I do not mean to be restricted to details of construction of the sevoral parts, although the forms shown are considered the best The means described are not only simple, strong,and effieient, but are easily crumed within easy reach of the driver and connected to the dog by a link or rod, S, the lever being provided with a spring-actuatedfinger, T, whichengages with a racksegment, U, to lock the lever to its adjustment. Having described my invention and set forth its merits, what I claim is 1. The combination of the hanger-frame, the

gangs of disks connected therewith to move obliquely, the tongue, a sliding dog pivotally connected to the tongue, a rack or stop for the dog to engage with, and rods connectingt-he gangs and dog, substantially as described.

2. The combination, with the tongue and obliquely-movable gangs of disks, of a rack connected to the t0ngue,a dog sliding on the tongue and engaging with the rack, rods connecting the dog and gangs of disks, a spring to keep the dog in engagement with the rack, and a i lever connected with the dog to move it out; of o engagement with the rack, substantially as described. 3.1The combination, with the tongue and obliquely-movable gangs of disks, of a rack connected to the tongue, a dog sliding on the tongue 35 and engaging with theirack, rods connecting thedog and gangs, of disks, and ahand-lever connected with the dog to slide it back and forth, substantially as described.

4. The combination, with? the tongue and 0 ob1iquely-movable gangs of disks, of a ratchetplate connected to the under side of the tongue, the sliding dog composed of theside plates connected together by cross pins or bolts arranged to bring one set nearer than theother 5 to the tongue, one of the pins serving to engage with the ratchet, a spring to hold .said pin 1 in engagement with the ratchet, and rods connecting said dog and gangs of disks, substantiallyas described. o

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE Ba TlElOlVISON.

\Vitnesses:

J. B. JOHNSON, D. H. BALDWIN. 

